It can be used normally in Safari 13.0.X, but 13.1.1 will not work. I tried to read the source code and Safari's release notes, but I didn't find the reason.
And I found that the order of "a=rtpmap" in the sdp sent and received in the above different versions of Safari is different.
13.1.1 Error prompts in Safari：
[Log] subscribe failed – Error: Ice procedure failed.
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